Annealing pot



G. A. HASSEL ANNEALING POT Feb. 18, 1930.

Filed Feb. l, 1928 lill/1111111111111fil/111111111 am tNVENTOR nw F53@ WITNESSES Cil Patented Feb. 18, 1930 UNETED STATES PATENT GFFICE GUSTAV A. HASSEL, OF MCKEESPORT, PENNSYLVANIA, ASSIGNOR TO PITTSBURGH STEEL FOUNDR-Y CORPRATION, 0F GLASSPORT, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA ANNEALING POT Application led February 1, 1928. Serial No. 251,083.

The object of the invention is to provide an annealing pot made from relatively thin sheet metal, and which combines easy and inexpensive construction with adequate strength and durability to satisfactorily withstand severe usage, and which is capable of withstanding the expansion and contraction strains incident to use.

The annealing box provided according to the invention comprises a sheet metal body portion provided with peripherally disposed reinforcing rings cast in position around the body. The rings are provided at the top and bottom and at any necessary intermediate points, detents being provided in the body for interlocking with the rings, and the top ring is interiorly offset to provide a seat for a cover.

The invention is illustrated in the accompanying drawings, and Fig. l is a vertical elevation of a pot made according to the invention; Fig. 2 a plan view of Fig. l; Fig. 3 a vertical section taken'on line III-III of Fig. l; and Fig. 4 a modication showing another type of base structure and another form of detent.

Having reference to Figs. 1 to 3 of the drawings, the pot shown comprises a tubular body portion l, reinforcing rings 2, 3 and 4 cast in position therearound, and a base 5, which as shown in Fig. 3 is also cast on the body as a lateral extension of the ring 4. A plurality of grooves or detents 6, formed exteriorly on the shell, and disposed at points where the reinforcing rings are located, assist in retaining the rings and in providing an integral structure. As shown in Fig. 3, the top ring is cast so as to extend abo-ve the body, and it is provided with a continuous internal offset or shoulder 7, thus providing a seat for a top or cover and space for sealing the cover with rsand or the like. One or more of the rings are provided with diametrically opposed lugs or trunnions 8, to assist in raising and moving the pot. In this construction the base is cast on the end, in such a manner that it is integral with ring 4.

In the construction of this pot, a tube of suitable diameter and length is preferably bent from a metal plate and the seam welded, thus providing a unitary, continuous body shell.L The detents 6 are formed at the proper places in any suitable manner, as by machining or rolling, either before or after forming the shell, and the prepared tube is used as a part of a mold formed in the customary manner, suitable patterns being used at the points where the reinforcing members and base are to be located, and when thus prepared, molten steel is poured into the mold.

Although a cylindrical pot is preferred, other shapes can be used embodying the advantages of the construction. The body shell can be made fromrelatively thin stock; for example, fora pot 8 feet high and 2O inches in diameter, a plate 9%), inch thick has been found to be fully satisfactory. The size and number of reinforcing members will, of course, depend upon the size ofthe pot-and its service rerpuirements.v Y

The detents 6 are preferably disposed peripherally about the body and spaced apart laterally along the tube. rIhey may be made continuous or discontinuous, as desired, the main criterion being to provide adequate engagement to secure maximum adherence and strength. The detente shown in Figs. l and 8 are under-cut, or dove-tailed, this type of groove being preferred because it prevents the metal from pulling out of the detents when the rings are being cast around, the shell, and it insures good adherence between the rings and the shell. Other forms may be used, however, such as an arcuate Vgroove 9, Fig. 4.

In some cases it may be desirable to modify the base structure shown in Figs. l to 3. @ne such modification is shown in Fig. 4, in which a plate 10 of the same size as the end of the body is set against one end when it is placed Vin the mold, and by the use of suitable cores,

the bottom reinforcing member 11 is prolonged laterally as shown, to engage the plate and make it an integral part of the structure.

According to the provisions of the patent statutes, I have explained the principle and operation of my invention, and have illustrated and described what I now consider to be its best embodiments. However, I desire leo to have it understood that, Within the scope of the appended claims, the invention may be practiced otherwise than as specifically illustrated and described.

5 I claim:

l. An annealing pot comprising a tubular metal body portion, and reinforcing rings cast on the periphery of the top and bottom of said body, the top ring being interiorly efl'set outwardly of the' body t'o form a seat for a cover.

2. An annealing pot comprising a sheet metal body portion provided adjacent to its ends with a plurality of detents, and rein- '15 forcing rings cast on the periphery of the top and bottom of said body` interlocking with said detents.l J. l

3. An annealing potcomprisingl a cylindrical shell made from sheet metal and provided with a plurality of detents disposed peripherally about its outer surface, longitudinally spaced reinforcing rings cast in position a out said shell and engaging said detents, and a base cast in position at the lower end of said shell integral with the lower reinforcing ring.

4. An annealing pot comprising a welded tube of sheet metal provided with a plurality of detents disposed in the outer surface thereof, and a plurality of spaced apart reinforcing rings cast in position, one of said rings being at each end of said tube, the lowerpring projecting across the bottom of the tube to form a base. In testimony whereof, I sign my name.-

GUSTAV A. HASSEL. 

